Stadium: Court 7 Round: 44 Ground: Clay
| UTR Pro Tennis Series Zadar | 2021/07/03 07:00 | Vito Tonejc v Frane Nincevic | 6-4,5-2 |
| UTR Pro Tennis Series Zadar | 2021/07/02 12:30 | Josip Krstanovic v Frane Nincevic | 6-4,1-6,7-5 |
| UTR Pro Tennis Series Zadar | 2021/07/01 09:30 | Constant De La Bassetiere v Frane Nincevic | 3-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/06/29 11:00 | Warren Sinius v Frane Nincevic | 5-7,3-6 |
| UTR Pro Tennis Series Zadar | 2021/06/28 12:30 | Frane Nincevic v Jerko Brkic | 6-1,7-5 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Frane Nincevic v Mathieu Perchicot | 6-2,2-6,4-6 |
| ITF M15 Sibenik | 2021/05/17 08:00 | Nikola Basic v Frane Nincevic | 6-7,6-1,10-8 |
| Challenger Zagreb | 2021/05/09 08:30 | Frane Nincevic v Ramkumar Ramanathan | 4-6,3-6 |
| ITF M25 Velenje | 2021/07/04 07:30 | Nicolas Bruna v Martin Benes | 6-2,7-5 |
| ITF M25 Belgrade | 2021/06/28 10:00 | Nicolas Bruna v Gorazd Srbljak | 2-6,3-6 |
| ITF M25 Belgrade | 2021/06/27 12:00 | Nicolas Bruna v Aleksandar Mihailovic | 7-6,6-0 |
| ITF M15 Monastir | 2021/06/21 08:00 | Aidan Mayo v Nicolas Bruna | 6-4,7-6 |
| ITF M15 Monastir | 2021/06/20 10:30 | Nicolas Bruna v Victor Gurevich | 7-6,6-3 |
| ITF M15 Monastir | 2021/06/13 09:00 | Perry Gregg v Nicolas Bruna | 6-3,2-6,19-17 |
| ITF M15 Monastir | 2021/06/07 08:00 | Julian Gimenez v Nicolas Bruna | 1-6,7-6,10-7 |
| ITF M15 Monastir | 2021/05/30 10:30 | Giacomo Revelli v Nicolas Bruna | 6-3,7-5 |